
1/4 to 3/4 inch crushed rock is the best choice for leveling. Decomposed granite or other compressible medium is also acceptable. |
Preparing the Surface
The EZ Pad modules can be placed on grass, dirt, or gravel, or any flat, level well supported surface. For best results, remove sod and prepare a level base. You may use any size crushed rock up to 3/4 inch or pea gravel for leveling. EZ Pads are 2 inches thick.
Flatness
Flatness is important, since EZ Pads are not absolutely rigid, and will conform to the underlying surface.
Levelness
The rule of thumb for levelness is 1" or less over 8'. An easy way to determine this is to purchase a straight 8' 2x4 (you can pick one out by looking down the length from the end, which will exaggerate any curvature), and if you don't have one, a bubble level. both can be had from your local home store for about $14.
Place the 2x4 on the location, and put the bubble level on the 2x4. If the bubble is not centered, raise the lower end until it is. If the end of the 2x4 is 1" or less from the surface, you are fine.
Levelness is primarily an aesthetic issue, because if the water line is not parallel to the edge of the hot tub, it looks wrong. The only time is presents a hazard to the hot tub is if either the jets are exposed which will mean water will be squirted out of the tub, or if the water intake is exposed, which will allow air to be pulled into the pump, which can damage it. However, it has to be really out of level for either of these things to happen.
NOTE: EZ Pads are designed to fully support hot tubs and spas. Placing a hot tub partially on a patio and partially on an EZ Pad could cause a localized difference in support. We do not recommend using EZ Pads in this way.
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